Burglar-alarm



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a w .I-Bvw. l D. D M 0. 4 Mw 6, E M W o 0 N w UNITED STATES PATENT OFFICE.

DANIEL L. IVARTZENLUFT, OF KUTZTOVN, PENNSYLVANIA.

BU RG LAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 609,640, dated August 23, 1898.

Application filed November 16,1897. Serial No 658.747. (No model.)

To all whom t may concern:

Be it known that l, DANIEL L. WARTZEN- LUFT, of Kutztown, in the county of Berks and State of Pennsylvania, have invented a new and Improved Burglar-Alarm, of which the following is a full, clear, and exact description.

This invention relates to electrically-actuated burglar-alarms and the object is to provide a simple and comparatively inexpensive means for closing the circuit and actuated by the jarring or breaking of a window-pane, door-panel, transom, or the like, and whereby upon such closing of the circuit an alarm will be sounded.

I will describe a burglar-alarm embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specication, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is an inside elevation of a window, showing my invention as applied thereto. Fig. 2 is a side view of a circuit-closer employed, and Fig. 3 is a view showing in full lines the normal position of the circuit-closer and in dotted lines the position that it may ZtSSlIIlle.

The alarm comprises a bell l, arranged in the circuit-wires 2 3, and in which circuit are a battery 4t and switch 5. The alarm bell may be placed in any desired and convenient place. The wires 2 3 are extended across the window and are attached to the frame thereof, and it is to be understood that the wires may extend across the several windows, doors, and transoins of a room. In the case of doors and swinging transoms, however', wires may be attached to the doors and transoms and at night connected to the main wires by suitable devices.

Mounted to swing on the upper wire 2 is a circuit-closer consisting of an arm 6, having a weight 7 at one end. The arm 6 is extended from a sleeve 8, and extended from the ends of this sleeve are contact-fingers 9, adapted under certain conditions to close the circuit between the wires 2 3. Another contact-tinger 10 extends from the sleeve S intermediate of its ends and in an opposite direction to the fingers 9. This finger lO is arranged between the wire 3 and the glass or panel, as indicated in Fig. 3.

In operation the weight end of the arm 6 will normally rest against a window-pane or the panel of a door, so that on any one jarring or pushing on the outside of a windowpane or door the arm will swing inward, and the arms 9 by engaging the wire 3, as indicated in dotted lines in Fig. 3, will close the circuit and cause the alarm to sound. Should the window-pane be drawn outward or broken, the arm 6 will swing outward and the finger l0 will close the circuit, as indicated in dot and dash lines in Fig. 3.

Having thus described my invention, I claim ,as new and desire to secure by Letters Patent- 1. A burglar-alarm, comprising an electric circuit, the wires'of which are extended across a window or the like, an alarm in the circuit, and a circuit-closer mounted to swing on one of the wires and adapted to close the circuit when swung out of its normal engagement with the window or the like, substantially as specitied.

2. A burglar-alarm, comprising an electric circuit, the wires of which are extended across a window or the like, an alarm in the circuit, and a circuit-closer consisting of a sleeve surrounding the upper wire, a weighted arm eX- tended from the sleeve, and normally resting against a window-pane or the like, and contactfingers extended in opposite directions from the sleeve, substantially as specified.

3. A burglar-alarm comprising electric-circuit wires arranged one above the other and a circuit-closer mounted to swing on the upper wire, the said circuit-closer having an arm provided with a weight at its free end and also having fingers adapted to engage with the lower wire, substantially as described.

DANIEL L. IVARTZENLUFT.

Witnesses:

S. L. MARX, J. H. MARX. 

